In this writing assignment from M.I.T.’s communication-intensive offering of Real Analysis, students choose 1 from among 3 (or so) proofs to write for their peers. The choice of problems varies each year depending on which problems have already been assigned for homework. We include the assignments from a few different years here to illustrate the range of problems assigned. It may be wise to warn students if some problems in an assignment are more challenging than others. For example, the Fall 11 assignment contains problems of different difficulty levels (“WritingAssignment2”). Many (but not all) of the problems come from Rudin.